why rrect: the ecg demonstrates a wide-complex regular tachycardia at 180 bpm with qrs duration ~160 ms, av dissociation, capture and fusion beats — electrocardiographic features most consistent with sustained monomorphic ventricular tachycardia rather than supraventricular tachycardia with aberrancy. the patient has ischemic cardiomyopathy with lvef 30% and a history of prior anterior mi, which places him at high risk of malignant ventricular arrhythmia. he presented with syncope, which is a concerning symptom for hemodynamically significant vt. even though troponin is not markedly elevated and he is hemodynamically stable in clinic, guideline-based management is hospitalization for monitoring and acute antiarrhythmic therapy as indicated, assessment for reversible ischemia, and expedited evaluation for icd placement for secondary prevention given sustained vt with syncope and lvef ≤35%. this option addresses immediate safety, risk stratification, and prognosis relevant to outpatient-to-inpatient decision making.

why the other answers are incorrect:

a: increasing beta-blocker dose and outpatient holter underestimates the immediate risk. a patient with syncope and sustained vt should be hospitalized for monitoring and not managed empirically with dose escalation and delayed diagnostics.

b: starting outpatient oral amiodarone without hospitalization is unsafe; additionally, the rhythm is vt rather than svt, and ablation may be considered later but is not the immediate first step before icd consideration in secondary prevention.

c: interpreting this as svt with aberrancy is incorrect given av dissociation, capture/fusion beats, and the clinical context of ischemic cardiomyopathy and syncope. discharging without device evaluation would expose the patient to high risk of sudden cardiac death.